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 The Verge ,, Good Article CRT
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 Return to top of page · Post #: 1 · Written at 10:43:20 PM on 25 May 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1993

I have a couple of these CRT units for the same Reasons mention in the Article .. Its a good read if you're like me and love the old CRT for many Reasons .. Heres the Link

pete

https://www.theverge.com/2018/2/6/16973914/tvs-crt-restoration-led-gaming-vintage


 
 Return to top of page · Post #: 2 · Written at 5:02:12 PM on 26 May 2020.
BurntOutElectronics's Gravatar
 Location: Melbourne, VIC
 Member since 2 October 2019
 Member #: 2392
 Postcount: 154

Gee I’d love to have a Sony PVM
Interesting to note that the other day I fixed up a British EKCO from ~1937 that has a spot in the dial allocated for receiving one of the old television bands! Whether it was for those early spinning disc type TV’s or a really early test of crt televisions I don’t know.

Lance


 
 Return to top of page · Post #: 3 · Written at 10:30:37 AM on 27 May 2020.
Irext's avatar
 Location: Werribee South, VIC
 Member since 30 September 2016
 Member #: 1981
 Postcount: 401

I used to work on Sony PVM semi professional monitors when I was a Technical Officer with the ABC in Melbourne and I can tell you from personal experience that they were an absolute dog to work on.
Absolutely no consideration was give to access for servicing.
Fortunately they were quite reliable and worked quite well but oh boy when they failed run away.


 
 Return to top of page · Post #: 4 · Written at 4:13:02 PM on 27 May 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1993

Those Sony CRT units from the 90s like the sony trinitron crt etc ,Are far heavier than all the other 90s brands,, I have had a few of them ,But hell its so heavy compared to a NEC etc , Must of had thick fronts on the CRT ??... People want them though. We often complain how heavy old 50s TVs are ,, Try carrying a 90s sony ,,, ! Thats one of the worst things about collecting vintage TVs , I'm always moving them from Room to Room etc ,,,Pain in ass it is . I built a box with wheels on so I can move them ,But it only works on Leg models.

Pete


 
 Return to top of page · Post #: 5 · Written at 4:31:15 PM on 28 May 2020.
Irext's avatar
 Location: Werribee South, VIC
 Member since 30 September 2016
 Member #: 1981
 Postcount: 401

There used to be a TV hand trolley many years ago as I recall.
It used a big suction cap against the CRT face.
Not much good for sets with separate safety screens however (which are the ones I'm mainly interested in).


 
 Return to top of page · Post #: 6 · Written at 6:33:04 AM on 29 May 2020.
Labrat's avatar
 Location: Penrith, NSW
 Member since 7 April 2012
 Member #: 1128
 Postcount: 292

Also, I think that the trolly was not suitable for use on Sony televisions which had the tubes that were curved from left to right, but had no curve vertically.

Wayne.


 
 Return to top of page · Post #: 7 · Written at 8:17:10 AM on 29 May 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1993

I actually think the high end crt models of the 90s gave the best image for watching movies ,Much better than a flat screen IMO .
Often old movies which is what I like to watch look terrible on LCD etc etc . I'm relating to DVD not free to air etc . The 90s CRT TVs I have had and some I still have with a Curve CRT produce Realistic colours and if your playing a B/W movie the Contrast is correct and the image is sharp and clear. . I would much prefer to watch Movies on a good curved CRT than a flat Screen any day .
Wish I had a Truckload of them !! to last me till I fall off my perch.

Pete


 
 Return to top of page · Post #: 8 · Written at 9:35:07 AM on 29 May 2020.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1912

Pete what you really want is a Philips / Pye / Kriesler with the 30AX (fully self converging large neck) 63cm CRT and the KL9A chassis. That is, the last Aus made Philips chassis.

Best picture quality / colourimetry, the 30AX had the legs on other CRTs because of the larger gun diameter (equates to small spot size equates to sharper highlights) and the phosphors are the right colours, unlike all the others that were sourced from NTSC countries. So your reds will actually be deep red and not orange like other CRTs. Proper greens too, not lime green!

The KL9 chassis was derived from the excellent KT3 chassis and had few problems (they'd learned how to make them by then). It is straightforward and easy to work on if you ever need to. Only fault I can recall was a bad G2 pot and the occasional metal fatigued solder joint.


 
 Return to top of page · Post #: 9 · Written at 9:57:27 AM on 29 May 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1993

Ian the KL9 was around 1983 -84 yes ?? and the K9 was Philips first made Oz Colour in sets in 1974 I think ?? I'm a bit out of touch with those Modern sets haha ....... Hard to find one I bet !


Pete


 
 Return to top of page · Post #: 10 · Written at 10:16:26 AM on 29 May 2020.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6354

I once had a 21 inch Mitsubishi computer monitor with the flat-curve Trinitron screen. It weighed a tonne. The anti-dishing circuit would have been a pain to develop for them and the later completely flat screens. At the time I found it odd that Sony allowed a competitor to use their screens. I always thought they jealously guarded the use of them.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 11 · Written at 10:37:15 AM on 29 May 2020.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1912

Actually Brad, Trinitrons had issues. They would wear out much quicker than most other CRTs. The evidence was the purple tinted highlights as the green gun was driven harder.

The Philips 30AX was an extraordinarily clever bit of design, returning to some basic but non-intuitive physics principles which Philips patented. It outperformed the Trinitron in many respects. I had examples of both for a number of years.

And yes Pete, the KL9 appeared in the early 80s after Philips Oz had tried and failed to make the Euro-designed K12 an economical proposition.


 
 Return to top of page · Post #: 12 · Written at 10:48:18 AM on 29 May 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1993

This will bring back Philips Memories ..

Rated G of Course / Pete

https://youtu.be/HBOpIkMxs0c


 
 Return to top of page · Post #: 13 · Written at 12:01:56 PM on 29 May 2020.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6354

You aren't wrong, Ian. In the case of my monitor, it may have merely been a dry joint but when it was warmed up it would lose one of the colours and turn everything a horrible ochre yellow. Banging hard on the side of the plastic cowling at the back would usually fix it. By the time it became a more permanent issue, it was time to move to a flat screen.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 14 · Written at 12:16:08 PM on 29 May 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1993

I had an NEC that would turn Green at times and of course, it was way beyond my little knowledge,But I never gave up on it and finally, I found the fault, It was the 3 colour Transistors loose in their joints so I re soldered them again and it fixed it , But it drove me NUTS for months wondering why the picture was going green .., Its a bit of a battle to have a strong interest in Vintage TVs when your Electronic knowledge can be written on a postage stamp !! But I keep going.

Pete


 
 Return to top of page · Post #: 15 · Written at 12:48:22 PM on 29 May 2020.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1912

Lance:
"
Interesting to note that the other day I fixed up a British EKCO from ~1937 that has a spot in the dial allocated for receiving one of the old television bands!

"
Sound for 405 line TV was AM in the very low VHF band. Ekco used to make some Vision Only TVs. The idea was you could listen to the sound on your radio (if it had this provision). The idea made a market for a new radio that you could buy before you bought the TV.

They used to play music through the day on the excellent quality wide bandwidth sound transmitter.

Not to mention what they did with it during WW2 to disrupt the German navigation beams (google "Batlle of the Beams")


 
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